Name:	cim_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesPortionRecognizedInEarningsNetQualitativeDisclosuresLossSeverityRate
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This item represents the percentage of underlying loans secured by third party guarantees against the loss of value in the underlying assets in the security considered as one of the factors in determining whether available-for-sale investments are other than temporarily impaired.

No definition available.

Name:	cim_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesPortionRecognizedInEarningsNetQualitativeDisclosuresThirdPartyGuaranteesPercent
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This item represents the latest three-month rate of prepayment speed considered as one of the factors in determining whether available-for-sale investments are other than temporarily impaired.

No definition available.

Name:	cim_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesPortionRecognizedInEarningsNetQualitativeDisclosuresThreeMonthConstantPrepaymentRate
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This item represents the latest twelve-month rate of prepayment speed considered as one of the factors in determining whether available-for-sale investments are other than temporarily impaired.

No definition available.

Name:	cim_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesPortionRecognizedInEarningsNetQualitativeDisclosuresTwelveMonthConstantPrepaymentRate
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_InvestmentHoldingsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

This item represents the delinquency rates of the underlying assets in the security that was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are other than temporarily impaired and measure the amount of impairment related to credit loss recognized in earnings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8A
-Subparagraph a.2.
-URI http://asc.fasb.org/extlink&oid=73527792&loc=SL6284381-111563

Name:	us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecuritiesPortionRecognizedInEarningsNetQualitativeDisclosuresDelinquencyRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_RangeAxis=us-gaap_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=cim_NonAgencyResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: